package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.BaseContext;
import com.itheima.common.CustomException;
import com.itheima.entity.*;
import com.itheima.mapper.OrdersMapper;
import com.itheima.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {

    @Autowired
    private ShoppingCartService shoppingCartService;
    
    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    public void submit(Orders orders) {

        //获取当前用户id
        Long userId = BaseContext.getId();

        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> shoppingCartLambdaQueryWrapper = new LambdaQueryWrapper<>();
        shoppingCartLambdaQueryWrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(shoppingCartLambdaQueryWrapper);

        if (shoppingCartList == null || (shoppingCartList.size() == 0)) {
            throw new CustomException("购物车为空，不能为空");
        }

        //查询用户数据
        User user = userService.getById(userId);

        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null) {
            throw new CustomException("用户地址值有误，不能下单");
        }

        //生成订单号
        long orderId = IdWorker.getId();

        AtomicInteger amout = new AtomicInteger(0);
        //遍历购物车，计算金额和获取订单明细
        List<OrderDetail> orderDetailList = shoppingCartList.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amout.addAndGet(item.getAmount().multiply(new BigDecimal((item.getNumber()))).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        orders.setNumber(String.valueOf(orderId));
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amout.get()));
        orders.setUserId(userId);
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "":addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "":addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "":addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "": addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);

        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetailList);

        //清空购物车
        shoppingCartService.remove(shoppingCartLambdaQueryWrapper);
    }
}
